Spotted Quoll is an underground mine which is a part of Forestania operation.
The mining method used is predominantly longhole stoping with a top-down sequence and paste filling of resultant voids.
A 3.0 m minimum mining width is used. The average length of stable stopes is between 10m and 30m. The average stope height is between 7m and 15m. Other geotechnical parameters are contained in the current Ground Control Management Plan.
The planned stope dilution is 0.5m (hanging wall) and 0.1–0.2m (footwall). Unplanned dilution (from host rock and paste) is 8.0% in weight at 0% Ni. The standard SG for dilution is 2.8t/m3 . A grade of 0% Ni is assigned to all material outside the block model. Ore recovery is 98%, and metal recovery is 98%. The pillar factor for unplanned pillars is 0%. Production rates reflect current mining performances and practice.
Being an operating mine, all infrastructure (apart from future capital development and external plants) is present and used on site, and allowance for new infrastructure, based on technical studies, is made in the CAPEX of the LOM.
Flying Fox has been an operating underground mine since 2005.
The mining method used is a mix of direct AVOCA, reverse AVOCA longhole stoping with a bottom-up sequence and rock and cemented rock fill above the 425 level, and a longhole top-down sequence and paste filling of resultant voids below the 425 level.
Mining factors a ........
